This chapter provides the use of radiochromic films for Ultraviolet (UV) dosimetry. A few examples of films that have been used for UV radiation exposure include, but are not limited to, polysulphone film, polyphenylene oxide (PPO) film, and the General Aniline & Film chromic external beam therapy film range. In many radiation therapy clinics around the world, radiochromic film dosimetry is frequently used for evaluation of radiotherapy dose received by the patient for a particular treatment. UV radiation is the portion of the electromagnetic spectrum in between x-rays and visible light, that is, between 40 and 400 nm. The chapter discusses some of the radiochromic films and reviews their UV radiation-exposure measurement characteristics. PPO has seen many uses in UV-exposure measurement from underwater UVB assessment through measurement of UV exposure of school teachers on playground duty. Dosimetry is essential to quantify the amount of radiation and to control deleterious effect of UV light.